President Barack Obama stands with Helen Loring Ensign, 85, from Palm Desert, Calif., after awarding the Medal of Honor posthumously to Army First Lt. Alonzo H. Cushing for conspicuous gallantry during a ceremony in the Roosevelt Room of the White House

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President Barack Obama and First Lady Michelle Obama arrive at a ceremony to present the Medal of Honor posthumously to Army First Lieutenant Alonzo H. Cushing for conspicuous gallantry in the Roosevelt Room of the White House. First Lieutenant Cushing received the Medal of Honor for his actions during combat operations in the vicinity of Cemetery Ridge, Gettysburg, Pennsylvania, on July 3, 1863

President Barack Obama stands with Helen Loring Ensign, 85, from Palm Desert, Calif., after awarding the Medal of Honor posthumously to Army First Lt. Alonzo H. Cushing for conspicuous gallantry during a ceremony in the Roosevelt Room of the White House. With them, from left to right, are Rep. Jim Sensenbrenner, R-Wis., Rep. Ron Kind, D-Wis., Army Secretary John McHugh and Veterans Affairs Secretary Robert McDonald.

U.S. Army First Lieutenant Alonzo Cushing is pictured in a military academy graduation photograph dated 1861, obtained on October 28, 2014. President Barack Obama posthumously awarded the Civil War artillery officer the Medal of Honor, the highest U.S. award for bravery, 151 years after Cushing was killed at the Battle of Gettysburg.

President Barack Obama stands with Helen Loring Ensign, as the citation for her relative, U.S. Army First Lieutenant Alonzo H. Cushing is read

Margaret Zerwekh of Delafield, Wis. raises her hand as she is acknowledged by President Barack Obama during a ceremony awarding the Medal of Honor posthumously to Army First Lt. Alonzo H. Cushing for conspicuous gallantry. President Obama acknowledged the work of Zerwekh, a 94-year-old amateur historian from Cushing’s hometown who painstakingly researched his story and lobbied Wisconsin’s congressional delegation for decades

First Lady Michelle Obama speaks during a special daytime workshop for high school students from military communities in the greater Washington area